/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __SNIC_TRC_H
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#define __SNIC_TRC_H
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#ifdef CONFIG_SCSI_SNIC_DEBUG_FS
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extern ssize_t simple_read_from_buffer(void __user *to,
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size_t count,
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loff_t *ppos,
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const void *from,
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size_t available);
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extern unsigned int snic_trace_max_pages;
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/* Global Data structure for trace to manage trace functionality */
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struct snic_trc_data {
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u64 ts; /* Time Stamp */
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char *fn; /* Ptr to Function Name */
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u32 hno; /* SCSI Host ID */
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u32 tag; /* Command Tag */
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u64 data[5];
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} __attribute__((__packed__));
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#define SNIC_TRC_ENTRY_SZ 64 /* in Bytes */
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struct snic_trc {
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spinlock_t lock;
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struct snic_trc_data *buf; /* Trace Buffer */
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u32 max_idx; /* Max Index into trace buffer */
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u32 rd_idx;
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u32 wr_idx;
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bool enable; /* Control Variable for Tracing */
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struct dentry *trc_enable; /* debugfs file object */
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struct dentry *trc_file;
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};
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int snic_trc_init(void);
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void snic_trc_free(void);
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void snic_trc_debugfs_init(void);
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void snic_trc_debugfs_term(void);
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struct snic_trc_data *snic_get_trc_buf(void);
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int snic_get_trc_data(char *buf, int buf_sz);
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void snic_debugfs_init(void);
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void snic_debugfs_term(void);
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static inline void
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snic_trace(char *fn, u16 hno, u32 tag, u64 d1, u64 d2, u64 d3, u64 d4, u64 d5)
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{
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struct snic_trc_data *tr_rec = snic_get_trc_buf();
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if (!tr_rec)
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return;
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tr_rec->fn = (char *)fn;
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tr_rec->hno = hno;
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tr_rec->tag = tag;
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tr_rec->data[0] = d1;
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tr_rec->data[1] = d2;
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tr_rec->data[2] = d3;
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tr_rec->data[3] = d4;
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tr_rec->data[4] = d5;
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tr_rec->ts = jiffies; /* Update time stamp at last */
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}
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#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
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do { \
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if (unlikely(snic_glob->trc.enable)) \
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snic_trace((char *)__func__, \
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(u16)(_hno), \
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(u32)(_tag), \
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(u64)(d1), \
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(u64)(d2), \
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(u64)(d3), \
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(u64)(d4), \
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(u64)(d5)); \
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} while (0)
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#else
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#define SNIC_TRC(_hno, _tag, d1, d2, d3, d4, d5) \
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do { \
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if (unlikely(snic_log_level & 0x2)) \
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SNIC_DBG("SnicTrace: %s %2u %2u %llx %llx %llx %llx %llx", \
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(char *)__func__, \
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(u16)(_hno), \
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(u32)(_tag), \
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(u64)(d1), \
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(u64)(d2), \
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(u64)(d3), \
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(u64)(d4), \
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(u64)(d5)); \
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} while (0)
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#endif /* end of CONFIG_SCSI_SNIC_DEBUG_FS */
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#define SNIC_TRC_CMD(sc) \
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((u64)sc->cmnd[0] << 56 | (u64)sc->cmnd[7] << 40 | \
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(u64)sc->cmnd[8] << 32 | (u64)sc->cmnd[2] << 24 | \
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(u64)sc->cmnd[3] << 16 | (u64)sc->cmnd[4] << 8 | \
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(u64)sc->cmnd[5])
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#define SNIC_TRC_CMD_STATE_FLAGS(sc) \
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((u64) CMD_FLAGS(sc) << 32 | CMD_STATE(sc))
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#endif /* end of __SNIC_TRC_H */
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